Taiwan's armed forces carried out an anti-blockade drill during annual war games, using the navy and coast guard to simulate escorting a merchant ship, the defense ministry said on Thursday, as China steps up its maritime pressure.
Taiwan, which China views as its own territory, has long been concerned that Beijing could try to choke off the island with a blockade or quarantine to force it into surrender.
In June, China began holding what it calls "law enforcement" patrols off Taiwan's east coast, to the anger of Taipei and prompting concern in Washington and some other Western capitals.
The navy worked with coast guard vessels to complete the escort and security protection duties, while a minesweeper cleared a safe navigation channel and guided the simulated merchant vessel to port, Taiwan's defense ministry said in a statement.
Taiwan's coast guard, which would have an auxiliary role helping the navy in time of war, said the drill took place on Wednesday and the ports the ship was taken to were both on the east coast.
It said it was the first time they had worked with the navy to hold an anti-blockade drill.
The 10-day Han Kuang exercise kicked off last week, rehearsing various scenarios should China ever make good on threats to try to seize the island by force. Taiwan's democratically elected government rejects Beijing's sovereignty claims.
Taiwan President Lai Ching-te on Thursday visited an underground car park at a hospital in Taipei's neighboring city of New Taipei that had been turned into an emergency ward, and a supermarket to see how provisions would be distributed in an emergency.
Lai was accompanied by senior foreign diplomats based in Taiwan, including the de facto US, Israeli and Canadian ambassadors. Taiwan has been keen to learn from Israel about its civil defense operations.
"We are not facing regional geopolitical changes alone, but together with the shared concern and joint efforts of the international community," Lai said at the supermarket, of the presence of the diplomats.
During a separate part of the exercise on Wednesday night, soldiers erected metal barricades, barbed-wire obstacles and concrete barriers on roads leading to a key Taipei bridge that could expect to be assaulted in any Chinese attack on the capital.
"I believe the military's plans would also include demolishing these bridges, if necessary, ensuring that the People's Liberation Army would not be able to use them to cross the river quickly and continue its advance," said Chieh Chung, a researcher from Taiwan's Institute for National Defense and Security Research who was watching the bridge drill.
